Pump jack



June' 2, 1925.

1,540,638 c. P. LAUGHTER Y PUMP JACK Filrd Deo. 5, 1924 2 Sheets-Sheet 2 I WiWi/f INVENTOR ATTORNEY A'lA-latelated dune 2, llditl,

renne JACK.

Applioetion lcd Becember 5, 1924. Serial No. 75112068.

To all whom it may concern.:

Be it known that l, @Hannes Premi LAUGHTER, a citizen of the United States, residing at Lnling, in the county of Caldwell and State of Texas, have invented certain new and useful improvements in Pump Jacks, of which the following is a speciican tion.

This invention relates to well pumping apparatus and refers particularly to pump jacks.

The principal object of the. invention is to provide a pomp jack which has an abso lutely straight power operation ooth up and down in the well,

Another object of the invention is that it decreases the power necessary to puinp a well at least 40 per cent.

The invention has also the advantage of attaining the adjustability of the length of the power stroke on the pinnp or polish rod to accommodate any well.

Qther objects are the simplicity of the pump jack, tending towards the elimination of complicated or too numerous parts, mak

4 ing it practically troubleproof; and its economical manufacture.

The new and improved pump jack will be more definitely and clearly understood by perusal of the following description, in connection with the accompanying drawings, and wherein:

Figure 1 .is a side elevational view of the pump j acl: in position on a well, with part of vthe power wheel broken away.

Figure 2 is a top View ofthe power wheel, looking along the line Z-J, of litigare l.,

Figures 3 and li are side elevational views, respectively, of modified forms of the power wheel, the latter Areduced in size for convenience of illustration, and showing the weight element secured directly to the wheel; and

Figurev 5 is a fragmentary sectional View of the power wheel, illustrating; a noodifican tion of the xneans for connecting and adjust ing the pump rod to the wheel.

Continuing the description of the pump jack and referring to its various parts more in detail, l denotes one of a pair of standm -ards upon which is mounted a shaft 2, supporting the power wheel 3, I

rlhis wheel, it will be seen, hasronnded openings 4-4 in lieu of spokes, this er rangement tending to greater strength, the

' within the well casing 8.

openings being'eqnally spaced around the wheel. noticed that the wheel has a groove 5 around its periphery, adapted to receive a cable 6, the opper end of which is secured to 'the wheel, the lower part of thecable being connected to the polish rod 7, reciprocating `A delivery pipe line is shown at 8a.

Another cable) is also connected to' the wheel on the opposite side and likewise travels within the groove 5. On the lower end of the cable 9 is suspended a comparatively heavy weight l() which has a box 1l extending into the ground. This weight is one of the particular features ofgthe pump jacln'and decreases the arnountlof power necessary to operate `'the pump to a great extent, and which will be more fully explained hereinafter.

Referring to Figures l and 3, on both sides or faces of the power wheel 3 are a pair each of rocker arms 12-12. These arms are circular in shape and are curved in line with the diameter of the wheel.. They are secured to the wheel by *bolts it-43., These rocher arms asvwill be seen from Figure 2 stand out from the faces of the wheel and are grooved underneath for the purpose of receiving the two connections le-dfi, of the jack line l5, leading to a source of power not shown. rllhe upper rocher arms are of smaller dimensions than those directly below, the sizes providing for various lengths of stroke on the polish or pump rod. There are also provided conn nections 1(31'6 adjacent the rocker arms for the connecting of cable leads lli-4.4i.

ln Figures 3, 4 and 5 are illustrated modiications of the power wheel, weight and cable connecting means. ln Figure 3 the cable may be attached by means of an eyed member 'i6 and on this forrn of wheel is a guide roller attachment i7 for the cable 9.; ,in Figure 4 the weight 10 is fastened directly to the wheel, this arrangement being desirable 0n a long pull; and in Figure 5 the wheel periphery has teeth 18-18 for` a link chain 19,' the chain being fastened to any of the teeth by a screw cap 20.

' ln operation, the jack lin 15 from the source of power is connected to one of the attachments i6 on the wheel and placed in the rocker arm groeve, according to the length of stroke desired. The pull on the By reference to Figure 2 it will be l rocker arm communicated to the wheel 3 will cause the cable 6 on the polish or pump rod to rise and the weight 10 will move downward, and owing to the connecting point of its cable on the Wheel, will greatly reduce the power necessary to lift the pump or polishrod. When the weight has descended or-moved around on the wheel sufficiently far or to about the point A, there is a moment when the weight exerts no pulling motion on the wheel to lift the rod. In other words, it might'be said that the weight is oli' the dead center of its pull to rotate the wheel in this direction. After the dead point is passed, however, and the wheel reverses its rotation or rocking motion, the weight has also an appreciable pulling action on, the wheel from about the point B.

t should be understood that modifications and changes may vbe made in thear rangement and construction of the invention without departing `trom the spirit and intent of the following claims:

l. A pump jack for wells comprising a wheel and a support mounted overa well, rocker arms arranged uponthe wheel and adapte-d to receive cables from a source of power, means on the Wheel for adjustably connecting the well cable carrying the pump rod; and a Weight on 'one side of the wheel to aid in reciprocating the pump rod in the well.

2. A pump jack forwells comprising a wheel supported over a well, a plurality of curved and grooved rocker arms on each side of the wheel adapted to receive cables from-a source of power to operate J(he jack, means for adjustably connecting said cables to the wheel to permit the cables to track in the grooves as the wheel rotates; means on the periphery ot' the wheel `for adjustably aliixing a cable and a track therefor; and a weight connected to the wheel to aid in reciprocating the pump rod in and out 0i a well.

i3. A pump jacl; for wells comprising a wheel mounted over a well, and having spaced apertures in lieu of spokes; rocker arms on the wheel-faces for power cables; means on theA periphery of the wheel for cvnneeting a pump rod line with means to enable the line to track on the wheel; a weight connected to the wheel to assist by gravitational pull thc rotation and rocking motion oi the wheel to reciprocate a pump rod in the well; and a guide means for the weiglit.

In testimony whereof I have signed my name to this specification.`

ontarienne Prnon LAUGHTER 

